Hot Sale Professional Step Drill Bit Size 6-60mm Spiral Groove Diameter 13mm HSS Stepped Drill Bit For Metal Cutting Tools

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Discount 20% Hot Sale Professional Step Drill Bit size 6-60mm Spiral Groove diameter 13mm HSS Stepped Drill Bit for metal Cutting tools available until 2017-10-17 Hot Sale Professional Step Drill Bit size 6-60mm Spiral Groove diameter 13mm HSS Stepped Drill Bit for metal Cutting tools

Features:

• In the unique step-shaped design, one bit can drill holes of various sizes so that one step drill bit is equal to many common bits.
• Compared with the common bits, the step drill bit sways little and can drill the perfect holes without the center punch.
• It can remove the spikes and countersink at the same time while drilling
• The step drill bit is made from HSS. It is used for drilling and processing the work-pieces, whose hardness is less than 25 degrees, such as carbon-steel plate, sheet-iron, insulation board, PVC panel and plank. Please note that this product is not for processing the stainless-steel.
• Please install the step drill bit onto the pistol drill and bench drill, whose spiral speed of 250-400R/M is recommended. The lifespan of bit can be prolonged when the water is poured as it works to cool it.
• (Note: Please make sure that the thickness of work-pieces is no more than the height of step before buying the step drill bit.)

Specifications:

• Material: HSS.
• Style of flute:spiral groove
• Hardness of work-pieces: less than 25 degrees.
• Size of steps:  12steps,6-60mm
• Thickness of work-pieces/Height of step: 5mm
• Diameter of handle: 13mm

Package Included:

• 1pcs HSS 4241 Spiral groove step drill

US $34.55/piece

US $27.64/piece

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